Question

Calculate the weight of benzene codistilled with each gram of water and the percentage
composition of the vapor produced during a steam distillation. The boiling
point of the mixture is 69.4°C. The vapor pressure of water at 69.4°C is 227.7 mmHg.
Compare the result with the data in Table 18.1.

Answer 1

Here is a site that goes through how to do this. Scroll down to the mass ratio.
http://www.docbrown.info/page07/equilibria8e.htm

Answer 2

10.1